If running firmware 9.6 or later, the user capacity is limited by underlying encryption.
If you use a WPA2/AES PSK and HotSpot, you limit max users to 100 users per radio, and according to Product Marketing, with Open Auth and HotSpot, up to 250 users per radio, 500 total clients per AP.
However, if you expect users to pass traffic, lower the expected maximum number of users per radio/AP.
Frequent reports of acceptable performance with 200 clients per AP have been received.